Chemistry · Oct / Nov 2024 · Paper 61 · Question 3
0620
As printed in the paper
The question as text
A student tests two solids: solid T and solid U. Tests on solid T Solid T is lithium sulte. Complete the expected observations.
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
3(a)[1]
red (flame colour)
3(b)[2]
M1 (from) purple
M2 (to) colourless
3(c)(i)[1]
sulfur dioxide / SO2
3(c)(ii)[1]
no change
3(d)[2]
M1 iron(II) / Fe2+
M2 chromium(III) / Cr3+
3(e)[2]
M1 add (excess / more) aqueous sodium hydroxide
M2 chromium(III) AND forms a solution / precipitate dissolves
OR
M2 iron(II) AND forms a green precipitate / precipitate does not dissolve / (precipitate) becomes brown
OR
M1 leave to stand / add more (aqueous ammonia)
M2 chromium(III) AND remains green / does not turn brown
OR
M2 iron(II) AND turns brown
3(f)[1]
iodide / I–
Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.